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PO@ElementCollection or @OnetoMany with Entity or primitives?
 

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    <p>I have a site with multiple pages, and each page has a table that contains some data. The tables have many columns, and users can select which columns to display or hide. I am trying to persist these selections.</p> <p>The question I have is choosing the best way to persist these objects.</p> <p>I see many possible ways, none of which Ive had success in implementing. But before I commit to one of them, I would like to know if I am doing it horribly wrong, or am way off the mark with how this should be implemented.</p> <p>I have a user class that is persisted already.</p> <p>Option #1 In my user entity, add a field of Map> where the key is the page name, and the list is the columns the user has selected on that page. Using @ElementCollection.</p> <p>Option #2 User entity has a @onetomany List. Which requires a UserColumns entity, with pagename as primary key, and @oneToMany relationship with another entity for each column.</p> <p>Option 1:</p> <pre><code>@Entity public class User{ private Map&lt;String, List&lt;String&gt;&gt; columns; @ElementCollection public void setColumns(Map&lt;String, List&lt;String&gt;&gt; colunms){ } } </code></pre> <p>Option 2:</p> <pre><code>@Entity public class User{ private List&lt;UserColumns&gt; columns; @ElementCollection or @OneToMany public void setColumns(List&lt;UserColumns&gt; colunms){ } } </code></pre> <p>I realize this will be difficult to answer without looking at the actual code, and I've probably not described the situation adequately or precisely, but welcome all input anyways. Thank you.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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